Plumber&#39;s furnace



March 19, 1935. E E L ER 1 1,995,118

PLUMBER S FURNACE Filed Dec. 4, 1931 s Sheets Sheet 1 March 19, 1935. E. E. GOLLER PLUMBERS FURNACE Filed Dec. 4, 1931 3 Sheets-Sheet 2 [72 wen for [6 63622195 60%? w +MM March 19, 1935; E. E. GOLLER 1,995,118

PLUMBER S FURNACE Filed Dec. 4, 1931 5 Sheets-Sheet 3 [n venfor:

il enelf GoZ/er:

Patented Mar. 19, 1935 UNITED STATES PATENT OFFICE 1 1,995,118 Y PLUMBERS FURNACE -i Eugene E. Goller, Chicago, Ill. 1 Application December ssr'seriai iiesvasss 2 Claimsf (o1. 15s--32) My invention relates to plumbers furnaces tion' secondary valve and orifice scraper,this and to novel improvementsin furnaces of this View being taken in the direction of the arrows type'to increase their efficiency-and to prolong 7-7 adjacent Fig; 1; 7 their useful period. 4 Fig. 8 is a central longitudinal section through Numerous objections have been apparent in thecombination secondary valve and orifice 5 the furnaces thus far offered to the trade, among scraper; v i which has been the overheating of the fuel tank Fig. 9 is a further enlarged sectionon the and controls, due to improper heat deflectionjand line'9-9 of Fig. 8; e f 1 the insuffici nt heating of the generator coil due Fig. 10 is a section onthe line l0+10 of Fig.'-

10 to lossesby convection and to the presence of air 8 on the same scale as Fig. 9;

in motion about the coil. Heretofore, wear at Fig. 11 is a central vertical section through the the bottom of the tank and at the welded jointfuel regulating valve, showing-also the checkhas caused considerable trouble anddange'r'. valve for preventing excessivepressurein thegen-' .It is, therefore an object of. my invention to erator'coil from backing-into the fuel tank; l I 4 provide a fuel tank constructionwhichwill be r Fig. 12 is a somewhatenlarged fragmentary 15 durable, safe, efiicient and economical. I section on the line.12 -12 of Fig. 1. I Another object is to provide a constructio Referring to the drawings in detail, and par-'- wherein the generator coil is protected from heat ticularly to Figs. 1 and12, theconstruction shown I losses, thereby rendering it more efficient. 7 comprises a fuel tank body 1 having a bottom go Another object is to provide protection against member 2 which'has a downwardly extending an--'- overheating of the-furnace controls and fuel tank. nular flange 3. To form a gas and fluid-tight seal A further object is to provide a construction between the lower edges of the tankbody-l and wherein the orifice body and generator coil will the flange 3, a welded joint 4 is provided which exalways remain in perfect alignment,- regardless tends entirely around the lower edges of-boththe;

of, the number of times they are dismounted from tank bodyl and the flange 3.- To protect the" the furnace for cleaning or other purposes. weld 4 from any wear whatever, a hardened steel A still further object is to provide a secondary ring 5 is forced inside the flange 3 and is welded ulating valve, in combination with a novel at' 6. e l orifice scraper, whichwill permit a more ac- In the upper portion of the tank body lsuitcurate heat control and providea much more vefable depressions '7 are provided to receive for ficient orifice scraper. i brazing the uprigh't supporting posts SQ-Inthis A still further object is to provide alocking portionof the tank is also provided a pressure means to prevent the accidental blowing out of pump '9,the filler opening having acap 10,-and

the combination valve and scraper stem when in the tank being provided with a discharge'pipe.

Yet another object is to provide a valve handle Mounted on o e O the 'D (Shown which will remain cool, regardless of how long left in Fig 15-3 Supporting arm 12 retain in the furnace has been in continuous operation. position the coil cup orshield 13,'which servesthe Other objects and advantages of the invention purpose of protecti the bu n fla against 40 will be apparent from thespecific'ationand claims. extr me drafts like y to b wou the flam, Said Referring to the drawings: cup 13 having in its bottom 1+1 a stamped-up por- Figure 1 is a side view showing the several eletion 15 to receive the boss 16 of the arm 12; The ments of my construction inelevation, with the arm. is provided with a thumb Screw exception of the coil cup which is cylindrical and hat it'm y b p p y a sted. When'the coil is shown in central, vertical section; cup 13 isto be removed, the arm 12 may be ro-- Fig. 2 is a top plan View of the topplate mem tailed entirely u of the Each post 8 has near its upper extremity-a Fig. 3 is a bottom plan view of the top plate portion :18 of reduced diameter-so that where Fig. 4 is a section on the line l4 of Fig. 2; the portion 18 adjoin thep pr p r a ledge is Fig. 5 is a top plan view of the heat shield or formed to support the heat deflector 19, said heat 50 heat deflector which serves to keep the various deflector having an arcuately up-raisedportion furnace controls cool; 19a, to accommodate the elbow 20 which unites Fig. 6 is a section on the line 66 of Fig. 5; the upper valve pipe 21 and the generator coil 22. Fig. 7 is a somewhat enlarged view of the gen- Above the post portion 18 is a further reduced erator coil, fuel regulating valve, and combinaportion 23, forming a shoulder on which the top 555 plate 24 may rest. The portions 23 are screw threaded to receive nuts 25 by means of which the top plate 24 is secured in position. Cast integrally with the top plate 24; is a cylindrical downwardly extending portion 26 (Figs. 1 and 4) having an arcuately shaped slotted portion 27 and another slotted portion 270,, to provide clearance for the generator coil 22. The downwardly extending portion 26 serves as a protector for the generator coil 22, to prevent air from moving about it. This permits the coil to become heated to a greater degree than would otherwise be possible, thus materially increasing its efficiency,

The portion 26 is provided with ribs 28 and 29, the ribs 29 being considerably smaller in width and thickness than the ribs 28, to form a shoulder 30 which abuts the upper edge of the heat deflector 19, thus retaining it positively in position. This cylindrical portion 26 extends through the opening in the deflector 19 and telescopes into the cylindrical shield 13 to position it, as shown in Fig. 1.

Mounted above the pipe 11 is a valve 31 having a valve handle 32 and the usual packing nut 33. Referring now to Fig. 11, in which a vertical section of the valve 31 is shown, it will be noted that the passageways 34 and 35 are offset to reduce the pulsating effect of gas pressure from the fuel tank. In the upper portion of the valve 31 is a check valve 36 having a ball check 3'7 and lugs 38, to prevent the ball 3'7 from being discharged into the pipe 21. This check valve 36 prevents heated. gas from reentering the fuel tank when the pressure in the generator coil exceeds that within the tank.

It will thus be seen that the check valve helps to maintain the fuel tank cool, thus preventing the formation of excessive pressure therein. In the upper portion of the valve 31 is a ground and faced depression 39 to receive the ground, faced portion 40 of the nut 41 at the lower end of the pipe 21; This construction permits a gas-tight seal without the use of tapered threads on the nut 42 and the portion 43 of the valve 31. It is well known that parallel threads are much more readily disengaged than tapered threads and it is apparent that the method of union shown and described permits the use of parallel threads as well as eliminates the necessity of washers or gaskets of any kind.

- Referring now to Figs. 7, 8, 9 and 10, it will be noted that the orifice body 43 has drilled into it an orifice 44. It is essential that this orifice be properly positioned relative to the generator coil above it. Considerable difliculty has heretofore been experienced inaccomplishing this after the furnace has left the factory. To overcome this, I provide the orifice body 43 with a squared end 45 fitting into a similarly squared female portion 46 in the elbow union 47 (Fig. 10), which obviously facilitates the proper positioning of the orifice 44 with respect to the generator coil.

Mounted within the body 43 is a valve stem 48 having an enlarged screw-threaded portion 49 and scraper portion 50. By rotating the stem 48 by means of the handle 51, the stem may be withdrawn until the scraper 50 is contacting the internal wall of the body 43 in the portion wherein is located the orifice 44. It will be evident by reference to Fig. 9 that rotating the scraper in this region will remove any soot or other foreign matter that may have gathered at the internal opening of the orifice in a much more efficient manner than has heretofore been possible.

To eliminate the danger of the valve stem 48 being blown out through the packing washers 52, the packing 53 and the packing nut 54, a sleeve 55 is provided as a safety look. It will be evident that the stem 48 can be brought back only until the edge 56 of the sleeve 55 abuts the surface 57 of the first of the washers 52.

At the inner end of the stem 48 is a faced, bev eled portion 58, which can be seated against the faced shoulder 59 within the orifice body. This forms a secondary control valve which permits accurate control of the flame issuing from the orifice 44 and which is not possible through the use of a single fuel control .valve. It will be noted that a minute groove 60 is cut into the beveled portion 58." This is done so that under no circumstances can the secondary control valve be used as a complete shut-off and so permit residual gasand carbon to remain in the generator coil.

Heretofore it has been difficult to handle the control valve, due to the uncomfortably high temperature developed in this-region. In the construction shown in Fig. '7, a means is'provided whereby the valve handle may be comfortably handled. A hole 61 is drilled in the end of the stem48 to receive the substantially circular steel ring 51, at which time the steel ring is open. An ordinary helical spring 62 of suitable size is placed over the steel ring 51'and the ring is then welded together as shown at 63.

The above described construction provides a handle which cannot be damaged by ordinary wear, which always remains cool enough to be comfortably handled, and which is very economical from the manufacturing standpoint.

Further modifications will be apparent to those skilled in the art and it is desired, therefore, that my invention be limited only by the prior art and the scope of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A furnace construction comprising a fuel tank, supports extending upwardly therefrom, a generator coil above said fuel tank, a cylindrical shield surrounding said coil, a support for the material to be heated mounted above said coil and having a cylindrical downwardly-extending portion telescopically engaging said shield to position it.

2. A furnace construction comprising a fuel tank, a generator coil mounted above said fuel tank, a shield surrounding said generator coil, a bafile plate having a central opening therethrough mounted above said shield, and a support for the material to be heated mounted above said baflle plate and having an annular portion extending downwardly therefrom through the opening in the baflle plate and telescopically engaging the shield to position it.

EUGENE E. GOLLER. 

